Born in Rio de Janeiro, Brazil, Gandelman comes from a family of musicians and was raised in a world of art. His first steps were taken on stages while touring with his father and at age 7, he composed and performed his own composition for the Italian feature film Pure Juice.

When he was 10, the Brazilian press featured him as a rising star and soon after, Gandelman was participating in studio recording sessions that now pay homage to some of his father's own work as well as a myriad of other artists.

At 16, Gandelman received the North American Scholarship to study Berklee College of Music in Boston, Mass. Upon graduating, he moved to Los Angeles.

Gandelman, Randy Ellis, Raymond C. Monteiro and Garrett Smith make up the horn section of the Tonight Show Band. The four musicians have been playing together since 2003. After continually crossing paths they formed their own group, simply called The Horns, and have since gone on to play with some of biggest names in the music business including Christina Aguilera, Prince, the Jonas Brothers, Stevie Wonder, Sting; James Brown, The Black Eyed Peas, Earth, Wind and Fire, James Taylor; Babyface, Whitney Houston, B.B.King, Diana Ross, Justin Timberlake, Jamie Foxx, Alicia Keys, Mariah Carey, John Mayer, Jennifer Hudson, Patti Labelle, Aretha Franklin and Shakira.